If the oil pressure switch has only one terminal. it is either normally open, or normally closed. (usually normally closed.) The warning light is not grounded at the light, it will have two leads. (or the wrong light is in the hole). One lead goes to the ignition, the other goes to the pressure sw. wwhen the engine is on not running, the Switch is closed lighting the light. When it starts, the Oil pressure opens the switch and the light goes out. The alternator is a different animal, and we need to know what kind it is, and if it is a modified version of that. There are too many variables to try to guess. JimN
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Today's Featured Article - Haying Before Tractors - by Owen Clark. Hi guys! At age 8 (1927, am now 79) I was learning how to drive a stacker team on the old homemade A-frame wooden stacker, on three of my uncles` dairy farms in Star Valley Wyoming (south of Jackson Hole, on the Wyoming-Idaho border). There was one steam tractor in the Valley, owned by an entrepeneur who used it to run his grain threshing machine, that he hauled from farm to farm for the fall harvest. We used teams of horses not only on the stacker, but on the buckrake to buck the dried
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